Filter.



* No. 806,920. PATENTED DEC. 12, 1905.

G- RDSSI.

- FILTER. APPLICATION FILED JULY 27, 1903.

2 SHEETB8HEET 1.

PATENTED DEC. 12, 1905.

2 sums-$112212.

G. ROSSI.

FILTER.

APPLIUATION FILED JULY 27, 1903.

//////////I/Ill/Ili/l/l/l/i/l/l///////////////////i 6 r III: III llldlln I 1 UNITED STATES PATENT OFFICE.-

Specification of Letters Patent.

Patented Dec. 12, 1905.

Application filed July 27, 1903. Serial No. 167,119.

To aZZ whom it may concern} Be it known that I, GIoRDANo RossI. fenc ingmaster, a subject of the King of Italy, residing at 9Viale Monforte,Milan, in the Kingdom of Italy, have invented certain new and usefulImprovements in Filters, of which the following is a specification.

This invention relates to a filter more especially intended for thefiltration of wines, but which by changing the filtering member,properly so called, may also serve for the filtration in the sameapparatus of the most diverse liquid or semiliquid substances.

The filter in question is characterized by its low cost, by its highefficiency due to the large extent of filtering-surface, and also by thefacility with which it may be employed.

The invention is based upon the use of pockets, bags, or sleeves offabric, which consti tute the filtering-surface proper. These bags orsleeves are plaited throughout their entire surface, the number of theseplaits and their extent dependingupon the area of the filtering-surfacewhich it is required to obtain.

The invention also consists in the employment of a method of suspensionand closing of the plaited bags within a vessel of wood or othersuitable material, this method of suspension permitting, on the onehand, of form- 0f the same.

ing a tight joint externally in such a manner that no part of the liquidto be filtered is lost, while, on the other hand, the bags are sosuspended that the mouth is maintained open and in a state of tensionthroughout its contour. In this manner the best result is obtainablefrom the entire filtering-surface.

The accompanying drawings show, by way of example only, several ways ofcarrying the invention into practice, the bags or sleeves being mountedin a wooden vessel.

Figure 1 is an external elevation. Fig. 2 is a vertical section throughFig. 1. Fig. 3 illustrates a modification, and Fig. 4 is a plan Fig. 5is a detail view showing the suspension and closing means for bagsprovided with longitudinal plaits. Figs. 6 and 7 are modificationshereinafter referred to.

a is the supply-cock for the liquid to be filtered, which enters theapparatus under pressure.

Z is an air-discharge cock.

0 0 are cocks for the discharge of the filtered liquid, the upper ofwhich may at the com mencement of operations serve also for the flow ofair.

d represents hinged bolts for fixing the removable cover f in position.

The apparatus is mounted in the following manner: The upper edge of themouth of the plaited bag Z, Fig. 5, provided in the usual manner with asleeve 9, through which is passed a tape or cord h, is folded around aring Z3, of wood or other suitable material, as shown in the drawings,Fig. 5. The tape 7 is then strongly stretched and tied at itsextremities, whereupon the bag remains suspended from the ring k. Alarge-meshed envelop Z is then arranged outside the bag, this envelopbeing in its turn. provided with a sleeve on and tape 11, its upperedge, owing to the tension of the tape at, being turned down over theedge of the bag Z around the ring in in such a manner as to cover it.This envelop Z serves to prevent the surface of the filter, owing to thedistention of the plaits due to the internal pressure ofthe liquid, fromadhering too closely to the inner face of the vessel, as in this case alarge part of the filteringsurface would remain unutilized, especiallyif bags having very narrow plaits arranged close together are employed.All around the edges of the bag c' and of the envelop Z, turned downover the ring 70, is arranged an indiarubber packing 0, Fig. 5,whereupon the ring k, with its covering constituted by the edges of cand Z and by the packing 0, is placed upon the inner rabbet 'of themouth of the vessel, the mean periphery of which corresponds exactly tothat of the ring is. After the cover f has been arranged and fixed inposition the bag 6 and its envelop Z remain suspended within the vessel,both being held open by the ring Zr, the packing 0 forming a tight jointexternally.

In order to maintain a suitable distance between the envelop Z and theinner wallof the vessel, a frame 2 is adapted to this latter and isformed, for example, by small wooden bars fixed to or removably arrangedupon the bottom of the vessel.

In order to obtain a large filtering-surface without increasing thedimensions of the apparatus, the arrangements shown in Figs. 3, 4, and 6may be adopted.

In accordance with the arrangement shown in Figs. 3 and 4 two bags iaresewed together along the line r 1" and provided with a single sleeve g,with a single tightening-tape 71,, and with a single envelop Z. Insteadof two united bags suspended from the same ring three or moremaybeemployed.

Fig. 6 shows a combination of two bags or sleeves provided with theplaits already mentioned, inclosed one within the other in such a mannerthat instead of a single filtering-surface there are two, and the liquidto be filtered is introd uced into a cylindrical or conical ring. Theouter sleeve 25 is suspended in the manner described with reference tothe other figures. The inner sleeve 16 is mounted upon a frame 4;, heldtogether above and below by means of tapes w and Upon the same frame thelower opening of the sleeve is pressed in the same manner. A secondframe 0, similar to the frame 1) of Fig. 2, or else a large-meshedenvelop, such as that shown in Figs. 3 and 5, serves to prevent anyundesirable adherence between the plaits of the sleeve 6 and the wall ofthe vessel. A central opening 00 is reserved at the bottom of the frame'0 for the passage of the filtered liquid which flows within the sleeve24.

Fig. 7 showsa constructional form in which sleeves are employed insteadof suspended bags and in which the plaits of the sleeves are directed atright angles to the axis of the sleeves themselves. 2 is a frame similarto the frame 0) of Fig. 6, upon which is passed the sleeve z. The lengthof this latter in a free state is a multiple of that which it presentswhen mounted and is reduced to the length of the frame by successivelycompressing the sleeve upon its lower mouth, which is suitably fixed tothe base 2 of the frame in such a manner as to form the plaits at rightangles to its axis in the manner represented. The manner of closing andfixing the sleeve i upon the frame which serves to support it is thesame as that shown in Fig. 6; but it may of course vary as desired.

The original length of the sleeve with respect toits final length whenmounted varies according to the thickness which it is desired to give tothe filtering-surfacethat is to say, to the number of plaits and thedegree of compression which they are to present.

What I claim, and desire to secure by Letters Patent of the UnitedStates, is

1. A filter comprising a vessel, a filter-bag, v

a supporting-ring located within the edge of the filter-bag, and apacking-ring U-shaped in cross-section and embracing the edge of thefilter-bag and the supporting-ring.

2. A filter comprisinga vessel, a filter-bag,

an envelop, a supporting-ring located within the edges of the filter-bagand the envelop, and a packing-ring U-shaped in cross-section andembracing the edges of the filter-bag and the envelop and thesupporting-ring.

3. A filter comprising a vessel having a rabbet and a cover, afilter-bag, a supportingring located within the edge of the filter-bag,and a packing-ring U-shaped in cross-section and embracing the edge ofthe filter-bag and the supporting-ring and seating in the rabbet andheld down by the cover of the vessel. In testimony whereof I havehereunto set my hand, in presence oftwo subscribing witmesses, this 10 dy o J u y. 1 3..

GIQRD NQ RQ$L Witnesses:

MIOHELEDE DRAGO, VIRGINIO CARNEVALI.

